Exam Settings: Students viewing answers at end of test

Currently, students are able to go back into a completed quiz and view all questions and answers. They see it immediately after completely their exam as well as being able to view their attempts on their own time. There is no option to disable this.

You have correctly pointed out that there is currently no way to limit or restrict feedback or the display of correct/incorrect to the student after they have completed the assessment. This is on our roadmap and will be part of a future release.